1. Language is important. Tell people you “work out of my home office” or that you “work from home.” Never say, “I work at home.” That suggests you create window treatments freelance in your spare time. “Home office” sounds more professional when you’re giving someone your phone number for work.

2. Some people like to dress for work, even though they never set foot outside their houses. Others like to lounge around in sweats or pajamas. It’s a matter of personal choice. But if you prefer the latter, change clothes at least once at night and once in the morning. Casual is fine. Crusty isn’t.

3. Talk to someone from the office at least once a day. Long silences are nervous-making. 

4. Gossiping, Web surfing, popping out to do a little shopping at lunch—those are healthy ways to decompress when you’ve spent an hour commuting and another three hours sitting in an uncomfortable chair drinking pallid coffee from the kitchenette and trying not to overhear the conversation in the next cubicle. At home, where all is relative peace and luxury, such activities seem to me Caligula-scale decadent. Still no one can work eight hours without pause. So establish some useful, non-fun things to do during work breaks that don’t induce guilt. 

5. If you have children, explain that when your door is closed they should not disturb you. If they fail to comply, explain that if they continue to interrupt then you will miss your deadlines and lose your job, which will force the family to live on the streets and sell all their toys for food.

6. Stay caffeinated. we don't need to explain, or tell you how many!

.......thanks to Leigh Buchanan at INC magazine.